TCP backend stream ID overflow (CVE-2026-33596)

Summary

TCP backend stream ID overflow

Original description

The description as published by the source.

A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2026-33596 dnsdist
Ubuntu UBUNTU-CVE-2026-33596 dnsdist

References

advisory github.com
advisory nvd.nist.gov
advisory dnsdist.org
package github.com
web repo.powerdns.com